it’s not that hard to back claims you make with facts when on the internet.

False, when it's 30 years or more back, it absolutely is, even things I remember from just 20 years ago can be hard to find. Sometimes it disappears other times it's drowned out by similar stories that are newer.
You are completely delusional about the efficiency of search engines, and the memory of the Internet, not every thing stays up even for just a few years.
Also it may lack context of things that were common knowledge of the time.

The ICC “optimization”, as far as I remember it, was related to the Xeon line of processors.

Maybe that too, but it's still correct as @Kangie wrote, it was 100% also used against AMD on consumer products.

Intel used every trick in the book, even when they weren't quite legal, because P4 was a shitty product, and they couldn't compete on merits with it. They even tried to revive P3, but it failed above a certain clock speed, 1.13 Ghz if I remember correctly.